dopa

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dopa

 [do´pah]
a compound produced by oxidation of tyrosine by tyrosinase; it is the precursor of dopamine and an intermediate product in the biosynthesis of norepinephrine, epinephrine, and melanin. The naturally occurring form is l-dopa (see levodopa), and is used to treat parkinson's disease and other forms of parkinsonism.

do·pa

, DOPADopa (dō'pă),
An intermediate in the catabolism of l-phenylalanine and l-tyrosine, and in the biosynthesis of norepinephrine, epinephrine, and melanin; the l form, levodopa, is biologically active. See: dopa reaction.
Synonym(s): 3, 4-dihydroxyphenylalanine

dopa

(dō′pə)
n.
An amino acid, C9H11NO4, that occurs widely in animals and plants. In humans and other mammals, it is formed in the liver from tyrosine and converted to dopamine in the brain.

do·pa

, DOPA (dō'pă)
An intermediate in the catabolism of l-phenylalanine and l-tyrosine, and in the biosynthesis of norepinephrine, epinephrine, and melanin; the l form, levodopa, is biologically active.

DOPA (dihydroxy phenylalanine)

a precursor in the biochemical PATHWAY leading to MELANIN formation in animals. DOPA is not metabolized in individuals with ALBINISM.

DOPA

The common name for a natural chemical (3, 4-dihydroxyphenylalanine) made by the body during the process of making melanin.
Mentioned in: Albinism

do·pa

, DOPA (dō'pă)
Intermediate in catabolism of l-phenylalanine and l-tyrosine and in biosynthesis of norepinephrine, epinephrine, and melanin.